The changes in the reaction kinetics and phase assemblage of sodium silicate-activated CaO-MgO-Al2O3-SiO2 glasses induced by the Al replacement by Mg

Hamdan, Abdelrahman; Hajimohammadi, Ailar; Njegic, Bosiljka; Kim, Tae‐Hwan

doi:10.1016/j.cemconres.2023.107103

Cited by 10 publications

References 83 publications

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Impregnate Carbonation: CO₂‐Guided In Situ Growth of Robust Superhydrophobic Structures on Concrete Surfaces

Jiang,

Ma,

et al. 2024

Advanced Materials

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Superhydrophobic surfaces applying on concrete can greatly improve the durability of concrete by preventing the damage from water. However, traditional design of superhydrophobic concrete surfaces by external coating encounters to problems of flaking and poor surface robustness, while that by adding hydrophobic agents or particles faces the challenges of strength damage of concrete. Drawing inspiration from the carbonation phenomenon of concrete, here a new design of in situ growing superhydrophobic structures on concrete is proposed: The concrete sample is impregnated into Mg2+‐containing silane–water system with continuous CO2 injection. The contact angle of the concrete surface achieves 171.9° without obvious strength decrease after 120 min, which are mainly attributed to the formation of CaxMg1−xCO3 crystals with micro‐nano‐structures and the reduction of carbonates surface energy by silane. This superhydrophobic concrete structure can be divided into a superhydrophobic–hydrophobic–hydrophilic three layers structure, providing the stable water‐proof protection under mechanical fatigue, capillary water absorption, UV aging, sulfate attack, and impurity water impact tests due to the in situ growing robust superhydrophobic structures. Furthermore, it captures 29.80 g m−2 CO2 during the reaction process, providing new insights for the design and preparation of eco‐friendly superhydrophobic concrete.

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Impregnate Carbonation: CO₂‐Guided In Situ Growth of Robust Superhydrophobic Structures on Concrete Surfaces

Jiang,

Ma,

et al. 2024

Advanced Materials

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Impact of Cr³⁺/Mo⁶⁺/W⁶⁺ Doping on Dipolar Relaxation and AC Conductivity in Li₂O–Al₂O₃–SiO₂ Glasses

Vijaya Krishna,

Pavić,

Bafti

et al. 2024

Physica Status Solidi (a)

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In this investigation, results of dielectric features of Li2O–Al2O3–SiO2 (LAS) glass doped with 3.0 mol% of Cr2O3, MoO3, and WO3 are presented. The investigation spans broad regions of frequency (ω) 10−2–106 Hz and temperature (T) 20–240 °C. Initial characterization of the samples by means of optical absorption spectra reveals that Cr ions do persist in Cr3+oxidation state, whereas fractions of Mo and W ions do present in Mo5+ and W5+ states in addition to predominant presence Mo6+ and W6 + ions, respectively. Infrared spectra suggest that Mo5+ and W5+ ions involve in modifying the network of the glass and induced structural disorder. Dielectric parameters and also σac are observed to be the largest for 40Li2O–5Al2O3–52SiO2:3.0 MoO3 (LASMo) glass followed by 40Li2O–5Al2O3–52SiO2:3.0 WO3 (LASW) and 40Li2O–5Al2O3–52SiO2:3.0 Cr2O3 (LASCr) glasses. Analysis of dipolar relaxation phenomena are carried out using Cole–Cole plots. Analysis of the results of σac suggests that polaronic conduction due to electron transfer between Mo5+ ↔ Mo6+ and W5+ ↔ W6+ is prevailed in case of LASMo and LASW glasses and these glasses are predicted to be useful as cathodes, whereas in LASCr glass, ionic conductivity is dominant and is suitable for electrolytes in ionic batteries.

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High-volume glass powder blended cements

Tian,

Bian,

et al. 2025

High-Volume Mineral Admixtures in Cementitious Binders

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The changes in the reaction kinetics and phase assemblage of sodium silicate-activated CaO-MgO-Al2O3-SiO2 glasses induced by the Al replacement by Mg

Cited by 10 publications

References 83 publications

Impregnate Carbonation: CO₂‐Guided In Situ Growth of Robust Superhydrophobic Structures on Concrete Surfaces

Impregnate Carbonation: CO₂‐Guided In Situ Growth of Robust Superhydrophobic Structures on Concrete Surfaces

Impact of Cr³⁺/Mo⁶⁺/W⁶⁺ Doping on Dipolar Relaxation and AC Conductivity in Li₂O–Al₂O₃–SiO₂ Glasses

High-volume glass powder blended cements

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The changes in the reaction kinetics and phase assemblage of sodium silicate-activated CaO-MgO-Al2O3-SiO2 glasses induced by the Al replacement by Mg

Cited by 10 publications

References 83 publications

Impregnate Carbonation: CO2‐Guided In Situ Growth of Robust Superhydrophobic Structures on Concrete Surfaces

Impregnate Carbonation: CO2‐Guided In Situ Growth of Robust Superhydrophobic Structures on Concrete Surfaces

Impact of Cr3+/Mo6+/W6+ Doping on Dipolar Relaxation and AC Conductivity in Li2O–Al2O3–SiO2 Glasses

High-volume glass powder blended cements

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Product

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Impregnate Carbonation: CO₂‐Guided In Situ Growth of Robust Superhydrophobic Structures on Concrete Surfaces

Impregnate Carbonation: CO₂‐Guided In Situ Growth of Robust Superhydrophobic Structures on Concrete Surfaces

Impact of Cr³⁺/Mo⁶⁺/W⁶⁺ Doping on Dipolar Relaxation and AC Conductivity in Li₂O–Al₂O₃–SiO₂ Glasses